This week’s Twitter IPO is going to make a few key shareholders a lot of money. On Monday, Twitter updated its SEC filing to increase its price range from $17 to $20 a share to $23 to $25 a share. At the top end of the range, the firm’s market value could be as much as $13.6 billion. So who will gain? Even though they can’t cash out immediately, here’s what Twitter’s top brass stands to gain if shares go for $25.

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Ev Williams, founder, 41

Total Shares: 56,909,847

Estimated Value: $1.42 billion

The former CEO is the only one anticipated to break a billion due to the IPO. He also created Blogger, another top site which was bought by Google.

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Jack Dorsey, chairman, 36

Total Shares: 23,453,017

Estimated Value: $586 million

Dorsey is currently working on Square, a successful mobile payment platform. Although Dorsey’s name is often linked as being an instrumental part of Twitter’s development, a recent New York Times article questioned his leadership of the firm.

NOAH BERGER / The New York Times / Redux

Dick Costolo, 50, CEO

Total Shares: 7,675, 239

Estimated Value: $191.8 million

Fun fact: Dick Costolo was a former standup comic. That’s why when tech academic Vivek Wadhwa criticized Twitter’s all-male board of directors in the New York Times, we could expect tweets like this:

Apart from sitting on the board of Twitter, Rosenblatt is also the CEO of 1stdibs.com, an online marketplace for luxury, vintage goods.

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Peter Fenton, director, 41

Total Shares: 31,568,740

Estimated Value: $789 million

Fenton is a venture capitalist and general partner at Benchmark, which owns 6.75% of Twitter. Although some reports say that he might not personally pocket his firms stake in Twitter, even if that is what the SEC filing would suggest. Benchmark invested in the company when it only had 30 employees in 2009.

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Peter Chernin, director, 62

Even though Chernin has zero shares, his name is still listed on the SEC filing. He received a $3.7 million payout, according to the Hollywood Reporter.Others:

Of course, these aren’t the only people with a lot to gain from the Twitter IPO. So-called 5% stallholders including Rizvi Traverse, J.P. Morgan, Spark Capital, Benchmark, Union Square Ventures, and DST Global will make substantial profits.